Adjustable window-screen



(No Model.) v 2 Sheets-Sheet 1 PQAHLBERG. ADJUSTABLE WINDOW SCREEN.

No. 419,397. Patented Jan. 14,1890.

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' 2 Sheets-Sheetfi. P. AHLBERG.

ADJUSTABLE WINDOW SCREEN.

No. 419,397. Patented Jan. 14, 1890.

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UNITED STATES PATENT 'OFFICE.

PETER AI-ILBERG, OF DETROIT, MICHIGAN.

ADJUSTABLE WIN DOW-SCREEN.

SPECIFICATION forming part of Letters Patent No. 419,397, dated January14, 1890.

Application filed anuary 28, 1889- Serial No. 297,774. (No model.)

To all whom it may concern:

Be it known that I, PETER AHLBERG, a citizen of the United States,residing at Detroit, county of WVayne, State of Michigan, have inventeda certain new and useful Improvement in an Adjustable Window-Screen; andI declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, which form a part of this specification.

My invention contemplates certain new and useful improvements inwindow-screens, and more particularly in adjustable windowsoreens, asmore fully hereinafter described, and pointed out in the claims, andillustrated in the accompanying drawings, in which- Figure l is a viewin perspective disclosing features of my invention. Fig. 2 is a sideelevation, the fixed portion of the frame being removed. Fig. 3 is avertical section on the line y y, showing also the screen in position.Fig. at is a horizontal section on the line :1: ac, and Fig. 5 is across-section on the The object of my invention is to provide awindow-screen which may be readily adjusted to various widths, on whichthe lower rail of the lower sash may be made to rest, when desired, andwhich need not be removed from the window-frame in order to close thewindow, although certain features of my invention are calculated alsofor screens to be removed to close the window.

My invention also has reference to the construction for adjustingthewings of the screen.

- I carry out my invention as follows:

A represents afixed screen-frame made in any desired manner and providedwith a screen fabric A. Upon the exteriorof said frame I engage, on thetop and bottom thereof, caps B B, grooved, respectively, as shown at b.These grooves, for convenience and economy of construction, preferablyextend from end to end of the caps, for the reason that as so made thegrooves may be made by an ordinary sticker-machine.

O 0' represent wings located upon the two sides of the frame A, andhaving an adj ustable engagement therewith, so as to be movedwindow-frame, so as to make the screen insect-proof. These wings Idesign to construct with a projecting shoulder at their bases, re

inward or outward, as required, to fill the- One or more screws, as at0, pass through said shoulders and may slightly engage said shoulders tothe parting-strip, but not so firmly as to prevent the upper side of thescreen being canted inward sufficiently to allow the lower rail of thelower sash when opened to rest upon the upper rail of the fixedscreen-frame, as shown in Fig. 3 at A I desire, also, in some cases toproject the upper ends of said wings above the fixed frame, so as toform a contact with the exterior surface of the lower sash-rail toprevent the screen from being moved too far inward, the projecting endsof the wings forming a stop. as shown at 0 The wings may, however, beconstructed without thus projecting the ends, if preferred, said wingsterminating at the dotted lines, Fig. 2. I prefer to make the wingsadjustable in the following manner: At the top and bottom the wings areprovided with arms 0 0 located within the grooves of the adjacent capsand having a movement to and fro therein.

To limit the movement of the wings the arms may be recessed on one side,as shown at 0 the adjacent portion of the cap being provided with a stopor shoulder 19. The recess 0 being suitably elongated, permits thus thedesired amount of lateral movement of the wings. IVhile I do not limitmyself to any particular method of stopping the movement of the wings, Iprefer the construction shown at the bottom of Fig. 2. Where the arm isconstructed with an elongated recess c" or slot 0 a pin, nail, or screw0 passed through the cap into the fixed frame, serves not only tounitethe cap and frame, but also at the same time affording a strong andefficient stop. Having an engagement both in the cap and frame, it isevident that the stop is very firm, as a stop having a bearing only atone end cannot be. Whether the arm is frame A by nails or screws.

provided with an elongated slot intermediate of its sides, orwhether theslot is open at one side, is of course immaterial.

I prefer that the arm should be constructed 5 with a kerf, as at 0 toreceive the wing. I

prefer also to make the grooves in the caps half-round, as such a grooveleaves the greatest strength of the wood, there being no sharp cornerstending to make the wood split and 10 weaken it.

2 5 through the wings, so that in case the window} frame is out ofstraightthe wings can be readjily tilted to conform to the desired shapeand more efiectually'close the aperture. Such a union permits the freeplay or movement of go the wings at the points oftheir engagement withthe arms, and an important result isobtainablc thereby.

I do not broadly claim a screen provided with grooved caps and wingsadjustably engaged therewith. I

\Vhat I claim as my invention is- 1.. The combination, with the frame A,provided with a screen fabric, of adjust-able side wings, said wingsprovided with laterally-projected shoulders to permit the engagement ofthe screen upon the outside of the partingstrip of the window-sash, theconstruction being such that the upper portion of the screen may becanted forward between the edges of the parting-strip and support thewindowsash, substantially as set forth.

2. The combination, with the frame A,provided with ascreen fabric, ofgrooved caps engaged with the upper and lower'rails of said frame andadjustable side wings provided with arms engaged by said caps, saidwings constructed with laterally-extended 'sh'oulders and theupper endsof said wings projected above the frame A, substantially as and forthepurpose described.

In testimony whereof I signthiszspeciflcw tion in the presence of twowitnesses.

PETER AI-ILl-EERG.

IVitncsses:

N." S. WRIGHT, CHAS. F. SALoW.

